Hi The F9P *will* do a survey in and fixed position. All of the parameters and commands are there.
=========== Doing a buy on the F9T might be easier if the part actually existed ….. Right now it is still in the vaporware phase. Bob > On Jan 25, 2019, at 5:30 PM, Dustin Marquess <[email protected]> wrote: > > Agreed. I'm sure the only difference between the two (if there really > is any) is all in the firmware. They seem to disable a lot of the > nicer timing features in their non-timing modules. Things like > UBX-CFG-TMODE2 to survey-in and enable 1SV timing mode is a big one. > > -Dustin > > On Fri, Jan 25, 2019 at 8:00 AM Bob kb8tq <[email protected]> wrote: >> >> Hi >> >> In every other generation of uBlox parts, the “high end” modules (in this >> case the P and the T) pretty much did the same >> thing with only minor differences. You do need precise position to get >> precise time. You also need precise time to get precise >> position. That’s just the way GPS works and always has worked. >> >> What gets us wrapped up are a bunch of specs that really are not very well >> qualified. Just what they mean be this or that >> is rarely clear. Is a timing accuracy tracing it all the way back to BIH in >> Paris? Is a location accuracy doing the same sort >> of thing? Even when they try to quantify a spec, that footnote may or may >> not be completely correct. A lot of these docs >> still talk about the M8 parts when you drill down into them. >> >> The only way to really know is to try some parts and see. That’s the way >> it’s always been with these modules from pretty >> much all the vendors. >> >> Bob >> >>> On Jan 25, 2019, at 6:07 AM, Mike Cook <[email protected]> wrote: >>> >>> So the ultimate question is: Do you need a F9P in order to find the >>> precise position of your F9T Antenna so that you can set up the F9T or is >>> the F9T’s survey mode as accurate ( I doubt it as the doc gives position >>> accuracy 2m ). Come to think of it, do you need three positioning receivers >>> to be sure of your position? and three P9Ts so that you can use >>> differential mode for best timing accuracy. I see no on board quantization >>> error correction mentioned, nor quantization error reporting though I >>> expect that is there, so for best accurracy that has to be added. This >>> looks as though it could get expensive. >>> >>> >>>> Le 24 janv. 2019 à 07:30, Dustin Marquess <[email protected]> a écrit : >>>> >>>> This looks ideal to me: >>>> >>>> https://www.u-blox.com/sites/default/files/RCB-F9T_ProductSummary_%28UBX-18069985%29.pdf >>>> >>>> -Dustin >>>> >>>> On Wed, Jan 23, 2019 at 8:01 PM Angus via time-nuts >>>> <[email protected]> wrote: >>>>> >>>>> Hi, >>>>> >>>>> It doesn't look like the F9P does anything special for timing - the >>>>> timing specs given in the F9T spec sheet are 5 ns (1-sigma, clear sky, >>>>> absolute mode) and +/- 4ns jitter, but for the F9P are 30ns RMS and >>>>> 60ns for 99%. >>>>> >>>>> I think I want an F9T :) >>>>> >>> >>> In the year 1000 CE, the Persian Muslim scholar al-Biruni first used the >>> term second in Arabic and defined it as 1⁄86,400 (that is, 1/(24 × 60 × >>> 60)) of a mean solar day. >>> >>> >>> _______________________________________________ >>> time-nuts mailing list -- [email protected] >>> To unsubscribe, go to >>> http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com >>> and follow the instructions there. >> >> >> _______________________________________________ >> time-nuts mailing list -- [email protected] >> To unsubscribe, go to >> http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com >> and follow the instructions there. > > _______________________________________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to > http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com > and follow the instructions there. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com and follow the instructions there.
